Like many other user's posts, mine isn't all that weird.
If I'm watching a variety or drama I burst out crying when someone on the show starts crying.
I often have dreams where people close to me pass away, I wake up with tear-stained cheeks.
Sneezing also makes me cry.

Always when I listen to really epic music. When I listened to my first dubstep song, the drop gave me such chills that tears came out of my eyes. I'm not trying to say dubstep is better than other music, it's just that sound or situation music makes me feel.